package com.example.dasan;

//import androidx.appcompat.app.AppCompatActivity;
//
//import android.content.Intent;
//import android.os.Bundle;
//import android.view.View;
//import android.widget.Button;
//
//public class MainActivity extends AppCompatActivity {
//
//    private Button bt1;
//    @Override
//    protected void onCreate(Bundle aa){
//        super.onCreate(aa);
//        setContentView(R.layout.activity_main);
//
//        bt1=(Button)findViewById(R.id.bt1);
//        bt1.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//                Intent sb=new Intent(MainActivity.this,AboutActivity.class);
//                startActivity(sb);
//            }
//        });
//    }
//}
import android.content.Context;
import android.graphics.Color;
import android.os.Build;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.Log;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.VideoView;

import androidx.appcompat.app.AppCompatActivity;

import java.util.Random;

import master.flame.danmaku.controller.DrawHandler;
import master.flame.danmaku.danmaku.model.BaseDanmaku;
import master.flame.danmaku.danmaku.model.DanmakuTimer;
import master.flame.danmaku.danmaku.model.IDanmakus;
import master.flame.danmaku.danmaku.model.android.DanmakuContext;
import master.flame.danmaku.danmaku.model.android.Danmakus;
import master.flame.danmaku.danmaku.parser.BaseDanmakuParser;
import master.flame.danmaku.ui.widget.DanmakuView;

public class MainActivity extends AppCompatActivity {

    private boolean showDanma;
    private VideoView mVideoView;
    private DanmakuView mDanmu;
    private BaseDanmakuParser mBaseDanmakuParser = new BaseDanmakuParser() {//弹幕解析器
        @Override
        protected IDanmakus parse() {
            return new Danmakus();
        }
    };
    private DanmakuContext danmakuContext;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.danmu);
        init();
        setOnListener();
    }

    /***
     * 一些初始化工作
     */
    private void init() {
        String uri = "android.resource://" + getPackageName() + "/" + R.raw.danmu;
        mVideoView = (VideoView) findViewById(R.id.video_view);
        mVideoView.setVideoPath(uri);
        mVideoView.start();

        mDanmu = (DanmakuView) findViewById(R.id.danmu);
        mDanmu.enableDanmakuDrawingCache(true);
        danmakuContext = DanmakuContext.create();
        danmakuContext.setScaleTextSize(1.1f);
        mDanmu.prepare(mBaseDanmakuParser, danmakuContext);
    }

    /***
     * 弹幕的准备工作，发送按钮监听。。
     */
    private void setOnListener() {

        mDanmu.setCallback(new DrawHandler.Callback() {
            @Override
            public void prepared() {
                showDanma = true;
                mDanmu.start();//启动弹幕
                generateSomeDanmu();
            }

            @Override
            public void updateTimer(DanmakuTimer timer) {

            }

            @Override
            public void danmakuShown(BaseDanmaku danmaku) {

            }

            @Override
            public void drawingFinished() {

            }
        });

        final LinearLayout operate_view = (LinearLayout) findViewById(R.id.operate_layout);
        Button send = (Button) findViewById(R.id.send);
        final EditText editText = (EditText) findViewById(R.id.edit);

        mDanmu.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (operate_view.getVisibility() == View.GONE) {
                    operate_view.setVisibility(View.VISIBLE);
                } else {
                    operate_view.setVisibility(View.GONE);
                }
            }
        });
        send.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String content = editText.getText().toString();
                if (!TextUtils.isEmpty(content)) {
                    InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                    imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);
                    addDamu(content, true);
                    editText.setText("");
                    operate_view.setVisibility(View.GONE);
                }
            }
        });

        getWindow().getDecorView().setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
            @Override
            public void onSystemUiVisibilityChange(int visibility) {
                if (visibility == View.SYSTEM_UI_FLAG_VISIBLE) {
                    onWindowFocusChanged(true);
                }
            }
        });
    }

    /***
     * 随机产生一些弹幕
     */
    private void generateSomeDanmu() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                while (showDanma) {
                    int time = new Random().nextInt(300);
                    String content = "" + time;
                    addDamu(content, false);
                    try {
                        Thread.sleep(time);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }
        }).start();
    }

    /***
     * 添加弹幕的方法
     * @param content 弹幕的内容
     * @param isSelf  是否是用户发送的弹幕
     */
    private void addDamu(String content, boolean isSelf) {
        BaseDanmaku danmaku = danmakuContext.mDanmakuFactory.createDanmaku(BaseDanmaku.TYPE_SCROLL_RL);
        danmaku.text = content;
        danmaku.padding = 5;
        danmaku.priority = 0;
        danmaku.textSize = sp2px(20);
        danmaku.setTime(mDanmu.getCurrentTime());
        danmaku.textColor = Color.argb(new Random().nextInt(256), new Random().nextInt(256),
                new Random().nextInt(256), new Random().nextInt(256));
        if (isSelf) {
            danmaku.borderColor = Color.GREEN;
        }
        mDanmu.addDanmaku(danmaku);
    }

    private float sp2px(int i) {
        final float fontScale = getResources().getDisplayMetrics().scaledDensity;
        return (int) (i * fontScale + 0.5f);
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (mDanmu != null && mDanmu.isPrepared()) {
            mDanmu.pause();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (mDanmu != null && mDanmu.isPrepared() && mDanmu.isPaused()) {
            mDanmu.resume();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        showDanma = false;
        if (mDanmu != null) {
            mDanmu.release();
            mDanmu = null;
        }
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        if (hasFocus && Build.VERSION.SDK_INT >= 19) {
            View deview = getWindow().getDecorView();
            deview.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
        }
    }
}
